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配合大盘趋势来判断，成功率很搞。
当中期，长期同时发出信号时成功相当搞。
短中长期选股
{N:2,250,6; M:2,250,12; P:2,250,24}
BIAS1:=(CLOSE-MA(CLOSE,6))/MA(CLOSE,6)*100;
BIAS2:=(CLOSE-MA(CLOSE,12))/MA(CLOSE,12)*100;
BIAS3:=(CLOSE-MA(CLOSE,24))/MA(CLOSE,24)*100;
短跌选股:IF(BIAS1<=-6,1,0);
中跌选股:IF(BIAS2<=-10,1,0);
长跌选股:IF(BIAS3<=-16,1,0);
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